//R
//R/deprecated.R
//R/sentiments.R
//R/stop_words.R
//R/unnest_ptb.R
//R/bind_tf_idf.R
//R/lda_tidiers.R
//R/stm_tidiers.R
//R/unnest_char.R
//R/unnest_regex.R
//R/unnest_ngrams.R
//R/unnest_tokens.R
//R/unnest_tweets.R
//R/corpus_tidiers.R
//R/mallet_tidiers.R
//R/reorder_within.R
//R/sparse_casters.R
//R/sparse_tidiers.R
//R/unnest_sentence.R
//R/dictionary_tidiers.R